Ricoh Company, Ltd.

Satoshi Ohmiya

Tatsuya Miyadera

Yasuhiro Abe

Yuichiro Shukuya

Makoto Higashiyama

Masahiko Oikawa

Tatsuo Ohyama

A communication apparatus includes a serializer configured to convert parallel data into serial data and output the serial data; and a deserializer configured to convert the serial data output from the serializer into parallel data and output the parallel data. The serializer is configured to add first data used for detecting unique data in the parallel data before the unique data, add second data used for detecting the unique data after the unique data, and add third data whose length is variable to each of the first data and the second data.

Communication apparatus, image forming apparatus, communication method, and computer-readable storage medium

An image formation apparatus for forming an image and test patterns. The image formation apparatus includes a storage unit that stores dither matrix data used to form the image and the test patterns; and an image formation unit that forms the test patterns based on the dither matrix data. A number of tones of the test patterns to be formed by the image formation unit is changed and the number of tones is determined based on a size of the dither matrix data and a number of bits per pixel within the dither matrix data.

Image formation apparatus and image formation method

An image forming apparatus includes an image data processing unit that converts combined data, in which image data to be used for adjusting image quality is inserted between pieces of print image data, into image forming data, and outputs the converted data; an image forming data counting unit that counts image forming pixels for each divided region obtained by dividing the image forming data in a sub-scanning direction; a storage unit that stores therein image forming data information relating to the image data to be used for adjusting image quality; and a control data generating unit that generates a control parameter for controlling image forming units based on count values of the image forming pixels. The control data generating unit generates the control parameters based on the image forming data information for a period in which the image data to be used for adjusting image quality is output.

Image forming apparatus in which a boundary between patches in a fixed pattern matches with a boundary between divided regions

An optical scanning device includes: light sources emitting first beams having colors; a beam splitting unit splitting the first beams into second beams; a deflecting unit including reflecting members, each corresponding to one of the second beams and each performing deflection scanning of the second beams; an optical system for image formation of the second beams scanning on target surfaces that have been assigned with colors corresponding to the first beams; a detecting unit for detecting which of the reflecting member corresponds to the second beam; an interchanging unit for obtaining data of a lines corresponding to each of the first beams and interchanging the data of the lines based on a detection result; and a light source control unit for controlling the light sources in such a way that the light sources emit the first beams in accordance with the data of the lines interchanged.

Optical scanning device, image forming apparatus, and optical scanning method

A write control circuit for controlling driving of a plurality of light sources each including a laser diode for emitting light includes a plurality of write control mechanisms configured to control the plurality of laser diodes to perform writing for image forming with a plurality of colors. Each of the plurality of write control mechanism includes at least one image development part for developing and processing image data and at least one laser diode control part for controlling driving of the laser diodes.

Write control circuit with optimized functional distribution

A forming unit forms a latent image of input image data. A counter counts number of times of forming the latent image in a sub-scanning direction, in which an upper limit of the number of times is set. A first control unit controls the forming unit to form the latent image based on the upper limit. A determining unit determines whether a latent image forming is performed by the forming unit exceeding the upper limit. When the determining unit determines that the latent image forming is performed exceeding the upper limit, a second control unit controls, the forming unit to continue to form the latent image.

Image forming apparatus, image forming method, and computer program product which counts the number of times of forming the latent image in a sub-scanning direction

A color image forming apparatus in which an engine controller outputs an operation start signal to write controllers at a timing at which a registration sensor detects a position of a sheet of transfer paper. Synchronization detection signals for colors are used to set reference positions for front edges of the colors in a main scanning direction. A write controller for a reference color outputs a write-operation start signal so as not to cut the synchronization detection signals each indicating one line for one color in the main scanning direction and line synchronization signals, into two parts in their longitudinal direction. The write-operation start signal is used to set a reference time point when the write controllers make transfer requests for image signals for the colors to an image processor.

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Kanagawa, Japan

Satoshi Ohmiya